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Unformatted text preview: descendents) Paraphyletic (not all descend from a common ancestor) See updated slides 15,16,17 for the pictures Shared ancestral characteristic this characteristic or trait evolved before the clade evolved so it is shared with individuals who are not part a monophyletic clade. Shared derived characteristic this characteristic or trait evolved when the clade evolved so it is shared with individuals. Dating fossils. Common strata layers. Dating methods radioactive decay, magnetism of rocks Stromalites are oldest example of life date back 3.5 Billion years...
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This note was uploaded on 08/15/2010 for the course BIO 5c taught by Professor Zhu/cardullo/rao during the Spring '08 term at UC Riverside.
- Spring '08